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Description: |
[3], 27 pages : illustrations, tables ; 27 cm |
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General Note: |
Research supported by the United States Department of the Interior, Fish and Wildlife Service and performed by the Office of Migratory Bird Management, Patuxent Wildlife Research Center, Laurel, Maryland. |
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Bibliography Note: |
Includes bibliographical references (page 27). |
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Contents: Acknowledgements. |
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Summary, Etc. Note: |
Abstract: Mourning dove population indices, as determined from the nationwide Call-Count Survey, increased from 1974 to 1975 by 10% in the Eastern Management Unit, remained unchanged in the Central Management Unit, and decreased by 3% in the Western Management Unit. The 1975 indices were below the 10-year means (1965-1974) by 4% in the Eastern and Central Units, but the index was 18% above the long-term mean in the Western Unit. Regression analyses of the call-count data for 1965-1975 indicate a downward trend in dove breeding populations in all management units; mean rates of annual decline were 2% in the Eastern and Central Units, and less than 1% in the Western Unit. |